After ~20 min clear of low wake area and throttle up but can't push past ~14k. Temps and oil pressure are normal.

Thought it might be a trim tab issue and I was just not driving out of the hole and getting up on plane. Can't actually see trim tabs, and no remote indication. Checked trim tab accumulator and listened to motor cycle as helm switches are pushed for up and down. All seem ok.

Underway, when transmission is in neutral, still no issue getting to max RPMs.

No black/blue exhaust even at full throttle (in neutral) so seems turbos are ok.

Any thoughts would be appreciated. I have two more days to trouble shoot before this vacation is over and I'll call my maintenance guys to have them take a look on our next time back at the boat.

@mmwjr & jmq26 - no, haven't begun periodic preventative maintenance, but I've read about the effectiveness of eel snot on the boards. Will read up on application and work it into next short hall or next time on the hard.

I used eelsnot in DEC 2017 - the time after I had the boat out in the picture above. Coated the shafts, props and rudders (used most of a can of running gear eelsnot - 4oz I believe). Pulled the boat to replace zincs in AUG 2018 and there was absolutely no growth. Used the remainder of the can on the props. We did use the boat a lot more frequently (every week or two) during that time period vice the once every couple of months when we had the growth issue so not sure if the use or the eelsnot was the cure.